我使用
scala 2.11和slick 2.1.0并编译代码：
trait TSegmentClient { this: Profile =>
import profile.simple._
class SegmentClients(tag: Tag) extends Table[(Int,Long)](tag,"seg") {
def segmentId = column[Int]("segment_id")
def clientId = column[Long]("client_id")
def * = (segmentId,clientId)
}
}
segmentClients.insert(clientBehaviors.map(c => (1,c.clientId)))
有用.
但我需要一个像这样的案例类：
case class SegmentClient(segmentId: Int,clientId: Long)
trait TSegmentClient { this: Profile =>
import profile.simple._
class SegmentClients(tag: Tag) extends Table[SegmentClient](tag,"seg") {
def segmentId = column[Int]("segment_id")
def clientId = column[Long]("client_id")
def * = (segmentId,clientId) <> (SegmentClient.tupled,SegmentClient.unapply)
}
}
segmentClients.insert(clientBehaviors.map(c => (1,c.clientId)))
但它没有编译.
(value: models.coper.datamining.SegmentClient)(implicit session:
scala.slick.jdbc.JdbcBackend#SessionDef)Int cannot be applied to
(scala.slick.lifted.Query[(scala.slick.lifted.Column[Int],
scala.slick.lifted.Column[Long]),(Int,Long),Seq])
segmentClients.insert(clientBehaviors.map(c => (segmentId,c.clientId)))
我的代码出了什么问题？
解决方法
您可以使用另一个投影到未映射到案例类的元组.
case class SegmentClient(segmentId: Int,"seg") {
def segmentId = column[Int]("segment_id")
def clientId = column[Long]("client_id")
def tuple = (segmentId,clientId)
def * = tuple <> (SegmentClient.tupled,SegmentClient.unapply)
}
}
segmentClients.map(_.tuple).insert(clientBehaviors.map(c => (1,c.clientId)))
